Fabrication and photoluminescence characteristics of In_2O_3 nanohillocks  

作　　者：魏合林 张磊 刘祖黎 姚凯伦 

机构地区：[1]Department of Physics,Huazhong University of Science and Technology

出　　处：《Chinese Physics B》2011年第11期519-524,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.10574047);the Key Program of the National Natural Science Foundation of China(Grant No.20490210)

摘　　要：Uniformly distributed polycrystalline indium nanohillocks are synthesized on silicon substrates with Au catalyst by using the radio frequency magnetic sputtering technique. The results show that the Au catalyst plays a key role in the formation of indium nanohillocks. After thermally oxidizing the indium nanohillocks at 500 °C in air for 5 h, the indium nanohillocks totally transform into In2O3 nanohillocks. The energy-dispersive X-ray spectroscopy result indicates that many oxygen vacancies and oxygen-indium vacancy pairs exist in the In2O3 nanohillocks. Photoluminescence spectra under an Ne laser excitation at 280 nm show broad emissions at 420 nm and 470 nm with a shoulder at 450 nm related to oxygen vacancies and oxygen-indium vacancies at room temperature.Uniformly distributed polycrystalline indium nanohillocks are synthesized on silicon substrates with Au catalyst by using the radio frequency magnetic sputtering technique. The results show that the Au catalyst plays a key role in the formation of indium nanohillocks. After thermally oxidizing the indium nanohillocks at 500 °C in air for 5 h, the indium nanohillocks totally transform into In2O3 nanohillocks. The energy-dispersive X-ray spectroscopy result indicates that many oxygen vacancies and oxygen-indium vacancy pairs exist in the In2O3 nanohillocks. Photoluminescence spectra under an Ne laser excitation at 280 nm show broad emissions at 420 nm and 470 nm with a shoulder at 450 nm related to oxygen vacancies and oxygen-indium vacancies at room temperature.

关 键 词：In2O3 nanohillocks magnetron sputtering growth models low-dimensional alloy surface 

分 类 号：TB383.1[一般工业技术—材料科学与工程]